MKS INC — Director's Dealing 2015

Jul 16, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2015-07-15

Reporting Person: CHUTE RICHARD S (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-07-15	Common Stock	M	12000	$24.35	Acquired	20782.824	Direct
2015-07-15	Common Stock	S	12000	$36.677	Disposed	8782.824	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-07-15	Director Stock Option (Right to Buy)	$24.35	M	12000	Disposed	2016-05-08	Common Stock (12000)	Direct

Footnotes

F1: This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person.

F2: This transaction was executed in multiple trades at prices ranging from $36.62 to $36.85. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, the full information regarding the number of shares and prices at which the transaction was effected.

F3: This stock option fully vests on the day prior to the first annual meeting of shareholders following the date of grant (or if no such meeting is held within 13 months after the date of grant, on the 13 month anniversary of the date of grant).